Electron acceleration during magnetic islands coalescence and division process in a guide field reconnection

被引：1

作者：

Han, Shengxing ^{[1
,2
]}

Wang, Huanyu ^{[1
,2
]}

Gao, Xinliang ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China

[2] CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China

来源：

CHINESE PHYSICS B | 2022年 / 31卷 / 02期

基金：

中国国家自然科学基金;

关键词：

magnetic reconnection; magnetic islands; electron acceleration; particle-in-cell simulation; PARTICLE-ACCELERATION;

D O I：

10.1088/1674-1056/ac21c0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic merging process related to pairwise magnetic islands coalescence is investigated by two-dimensional particle-in-cell simulations with a guide field. Owing to the force of attraction between parallel currents within the initial magnetic islands, the magnetic islands begin to approach each other and merge into one big island. We find that this newly formed island is unstable and can be divided into two small magnetic islands spontaneously. Lastly, these two small islands merge again. We follow the time evolution of this process, in which the contributions of three mechanisms of electron acceleration at different stages, including the Fermi, parallel electric field, and betatron mechanisms, are studied with the guide center theory.

引用

页数：6

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